Piston



March 24, 1931. PALMER 1,798,105

PISTON Filed Aug. 9, 1928 EQJ.

INVENTOR. HwrryAPaTmer,

' ATTORNE Patented Mar. 24, 1931 UNITED STATES PATENT OFFICE HARRY A. PALMER, 0F DORCHESTER, MASSACHUSETTS, ASSIGNOR TO PALMER IN- vnnrrons, Inc, or sosron, MASSACHUSETTS,

SETTS PISTON Original application filed April 11, 1927, Serial No. 182,805. Divided. and this application filed August 9,

1928. Serial No. 298,573.

This invention relates to pistons for internal combustion motors, and is a division of my application filed April 11, 1927, Serial No. 182,805, and the invention has for its object to provide. in a manner as hereinafter setforth the head of the piston with new and novel means for deflecting the charge on entry to the combustion chamber of the motor in a direction forwardly with respect to the exhaust outlet of the cylinder of the motor.

Further objects of the invention are to provide, in a manner as hereinafter set forth a piston for internal combustion engines which is simple in its construction, strong, durable, compact, thoroughly eflicient in its use, and comparatively inexpensive to manufacture.

With the foregoing and other objects in view the invention consists of the novel construction, combination and arrangement of parts as hereinafter more specifically de scribed, and illustrated in the accompanying drawings, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications can be resorted to which fall within the scope of the claim hereunto appended.

In the drawings wherein like reference characters denote corresponding parts throughout the several views:

Figure 1 is an elevation of a piston in accordance with this invention.

Figure 2 is a top plan view thereof.

Figure 3 is a fragmentary view in elevation, upon an enlarged scale and taken at right angles to that shown in Figure 1.

Figure 4 is a section on line 4-4: Figure 2.

Figure 5 is a fragmentary view in perspective illustrating the deflector at the head of the piston.

Although a deflector in accordance with this invention is designed primarily for use in connection with the form of piston as disclosed in the application aforesaid, it is to be understood however, that the piston body can be of any desirable form and having integral with its head a deflector in accordance with this invention.

In the drawings 1 denotes a hollow piston body closed at its ends 2, 3. The closed end A CORPORATION OF MASSACHU- 2is termed the head of the piston. The piston body is provided in proximity to each end with peripheral grooves 4: in which is adapted to be mounted a piston ring not shown.

Formed integral with the head 2 and extending across the same at diametrically'opposite points is a deflector in accordance with this invention and which is generally indicated at 5. The forward edge 6 of the defleet-or 5 is rounded and the body of the latter at any point thereof in transverse section gradually decreases in width from its point of joinder with the end 2 to the top edge 6, the latter being of convex curvature throughout.

The deflector 5 includes arcuate portions 7, 8 and 9. The portion 7 is the central part of the deflector and the portions 8, 9 are the outer parts. The parts 8, 9 are reversely curved with respect'to the part 7. The part 7 is interposed between the axis of the end 2 and the edge of said end. The parts 8, 9 are arranged with respect to opposite sides of the axis of the head 2. The part 8 has its free end flush with the edge of the head 2 and the part 9 has its free end flush with the edge of the head 2. The free ends of the parts 8, 9 are diametrically disposed with respect to the head 2 and are intersected by the diametric center of said head. The outer edge 10.0f the part? is upon the same are as the arc of the outer edges 11, 12 respectively of the parts 8, 9. The edge 10 is of greater length than the'edges 11, 12. The length of the edges 11, 12 is the same. The are of the inner edge 13 of thepart 7 is upon the arc of the inner edges 14, 15 respectively of the parts 8, 9. The edge 13 is of less length than the edges 14, 15. The edges 14, 15 are of the same length. The outer edge 10 of the part 7 is upon the same are as that of the inner edge 13 of said part.

The thickness of the deflector 5, at any piston body 1. The sides of the deflector are oppositely curved and the curvature is concave and which is clearly shown in Figure 5. he eight f t e f e r 5 s, a desired but when set up the major portion of the deflector is oflset with respect to the axis of the end 2 whereby the deflector will be eccentrical'ly disposed with respect to the end 2 so. that the part thereof which clear of the deflector will be of greater area than the other part which is clear of the deflecton Owing to the curvature of the deflector the deflecting ofcharge is had in a thoroughly efiicient manner and does not in any manner retard the incoming charge, but permits it to readily travel in a direction to which it is deflected and such direction is forwardly with respect to the exhaust outlet of the cylinder of the motor.

It is thought the many advantages of a piston, in accordance with this invention can be readily understood, and although the preferred embodiment of the invention is as illustrated and described, yet it is to be understood that changes in the details of construction can. be had which fall within the scope of the invention as claimed.

WV'hat I claim is: v

A piston for internal combustion engines comprising a body portion having one end constituting the head thereof, a deflector formed integral with and having its ends squared and flush with the opposed parts. of the edge of the head and having its top throughout of convex curvature, said deflector gradually decreasing in width in vertical section from its base to its top and having the side faces thereof extending toward each other and upon a slight concave curve, said side faces being reversely curved in vertical section at any point throughout the length of the deflector, said deflector-including an arcuate centralpart and a pair of arcuate outer parts reversely curvedwith. respect to the central part, said central part having its inner edge spaced throughout from the of the head and positioned between said axis and the edge of the head, said end parts arranged on opposite sides of theaXis ofthe head, spaced from said axis and having their outer termini intersected centrally by the diametric center of the head, the outer edge of said central part, being upon the same are as and of materially greater length than the inner edge thereof, the outer edges of said outer parts being upon the same are as and of materially greater length than the inner edges thereof,the inner edges. of said outer parts being of greater length than the inner edge of said central-part and the outer edges of said outer parts being of lesslength than the outer edge of saidcentral part. i In testimony whereof, I aflixmy signature hereto.

HARRY A. PALMER] 

